Aryliminothiazolidine compositions and methods

ABSTRACT

Thiazolidines bearing in the 3-position a lower alkyl, lower alkenyl or lower chloroalkenyl group and bearing in the 2position an arylimino group, which in turn is substituted on the carbon atom adjacent to the imino group, are acaricides. The compounds, of which 2-(2-chlorophenylimino)-3-methylthiazolidine is representative, can be prepared in a number of ways such as through cyclization of an appropriately substituted thiourea.

United States Patent Behner et al.

Aug. 5, 1975 ARYLIMINOTHIAZOLIDINE COMPOSITIONS AND METHODS Inventors: Otto Behner: Wilhelm Stendel, both of Wuppertal-Elberfeld. Germany Assignee: Bayer Aktiengesellschaft. Germany Filed: Nov. 21. 1973 Appl. No.: 418.056

Related US. Application Data Division of Ser. No. 205.348. Dec. 6, i971. Pat. No. 3.804.848. which is a continuation-impart of Ser. No. l29.265, March 29. l97l. abandoned.

Foreign Application Priority Data Apr. I5, 1970 Germany 20l7969 US. Cl. .l 424/270 Int. Cl C07d 9l/l8 Field of Search 424/270 {56] References Cited UNITED STATES PATENTS 3.692.912 9/l972 Brokke 424/270 3.749.787 7/l973 Hepworth et al l 424/270 3.804.848 4/l974 Behner et al. 260/306.7 T 3.8l0,988 5/l974 Janiak 424/270 Primary Examiner-Richard J. Gallagher [57] ABSTRACT 108 Claims, No Drawings ARYL] MINUTHIAZOLI DINE COMPOSITIONS AND METHODS CROSS-REFERENCE This is a divisional of our copending application Scr. No. 205,348, filed December 6. 1971, now US. Pat. No. 3,804,848, issued April l6, 1974, which in turn was a continuation-in-part of our application Ser. No. [29,265, filed March 29, l97l, now abandoned.

DETAILED DESCRIPTION The present invention relates to 2- aryliminothiazolidines, to a process for their preparation, to their use as acaricides and to compositions adapted to this use.

2-Arylimino-3-aryl-thiazolidines are known and are described for example by F. B. Dains et al., J. Am. Chem. Soc. 44, 2637 H922) and J. Am. Chem. Soc. 47, 1981 (1925). and O. Mitsunobo et al., Bull. Chem. Soc. Japan 39, 708 (1966). 2-Phenyl-amino-3-methyland ethylthiazolidines are also known, having been described for example by F. B. Dains et al., J. Am. Chem. Soc, 47, l98l (1925) and E. Cherbuliez et al., Helv. Chim. Acta 49, 807 (I966).

The present invention pertains to Z-arylimino-B-substituted-thiazolidines of the formula:

in which R is phenyl substituted by one to three members se lected from the group consisting of lower alkyl, lower alkoxy, trifluoromethyl and halo, at least one of which is in the 2-position; l-naphthyl or 5,6,7,8- tctrahydrol -naphthyl, and R is straight-chain or branched alkyl or straightchain or branched alkcnyl which is optionally sub stituted by one or more halogen atoms, and their salts.

The new compounds of this invention are outstandingly suitable for combatting animal ectoparasites, especially acarids.

It will be observed that the compounds of the present invention are characterized firstly by an arylimino group in the 2-position which group is further substituted on the carbon atom of the aryl ring adjacent to the imino group, and secondly by a lower alkyl, lower alkenyl or lower chloroalkenyl group in the 3-position. The aryl moiety of the arylimino substituent can thus be a 2-substituted phenyl group optionally bearing one or two additional substituents, the substituents being selected from the group consisting of lower alkyl, lower alkoxy, halogeno or trifluoromethyl. Alternatively the Z-substituent can comprise the residue of a bcnzo nucleus or the hydrogenated analog thereof so that the arylimino group corresponds to l-naphthylimino or 5,- 6,7,8-tetrahydrol-naphthylimino.

Thus the substituent R in formula l is phenyl substituted by one to three members selected from the group consisting of lower alkyl, lower alkoxy, halogeno or trifluoromethyl, one of the substituents being in the 2- position of the phenyl ring, l'naphthyl or 5,6,7,8 tetrahydrol-naphthyl.

The substituent R' is a lower alkyl, a lower alkenyl group or a lower alkenyl group bearing one or more chloro substituents.

The term lower alkyl refers to a straight or branched monovalcnt hydrocarbon group of from I to 6 carbon atoms, preferably 1 to 4 carbon atoms. Representative of such groups are thus methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec.butyl, tertbutyl, pentyl, hexyl and the like. The term lower alkoxy refers to a lower alkyl group bound to the remainder of the molecule through an oxygen ether bond such as methoxy, ethoxy, n-propoxy. isopropoxy, n-butoxy and like. The term lower alkenyl refers to a lower alkyl group of at least two carbon atoms in which two adjacent carbon atoms are bound through an ethylenic bond. Lower alkenyl thus embraces such groups as vinyl, allyl (prop-2- enyl mcthallyl( Z-methylprop-Z-enyl propl -enyl, cr0tyl(but-2-enyl), 2,2-dimethylvinyl. 2-chloroallyl, 3- chloroallyl, 2,3-dichloroallyl and the like.

R is preferably phenyl substituted in the 2-position, the 2,4-positions or the 2,6-positions such as 2-tolyl, Z-trifluoromethylphenyl, Z-fluorophenyl, 2- chlorophenyl, lbromophcnyl, Z-methoxyphenyl. 2,4- xylyl, 2,6-xylyl, Z-chloro-fi-methylphenyl, 2-methyl-4- chlorophenyl, 2,6-dichlorophenyl, 2,6dibromo-4- methylphenyl, 2-chloro-6-methoxyphenyl, 2-methoxyo-methylphenyl, 2,6-dimethoxyphenyl, 2-chlor0-6-trifluoromethylphenyl, 2-methyl-6-trifluoromcthylphenyl or Z-methoxy-d-trifluoromethylphenylv R is preferably methyl, ethyl, n propyl, n-butyl, isopropyl, isobutyl, sec.-butyl, tert.-butyl, allyl, crotyl, methallyl, 2,2-dimethylvinyl, 2-chloroallyl, 3- chloroallyl or 2,3-dichloroallyl. Especially preferred is lower alkyl of l to 4 carbon atoms, allyl, dimethylvinyl and 2-chloroallyl.

These 2-arylimino-thiazolidines display strong ectoparasiticidal action, especially against strains of ticks which are resistant to phosphoric acid esters and are furthermore highly active against mange mites. Advantageously they are stable in solution or suspension or when used in a cattle dip.

The present invention also provides a process for the preparation of a 2-arylamino-thiazolidine of formula l or a salt thereof, in which a. a thiourea of the formula:

in which R and R are as defined above, and Y is hydroxyl, halogeno or a sulphonyloxy group, is cyclized, optionally in the presence of a strong acid; b. a thiourea of the general formula:

in which R and R are as defined above, is allowed to react with l,2-dihaloethane; c. an arylamine of the general formula:

R-NH

N/R Ca,

in which R is as defined above, or d. a 2-arylamino -A -thiazoline of the formula:

N l I S NH-R in which R is as defined above, is allowed to react with a reactive ester of an alcohol of the formula:

in which R is as defined above, and when desired the 2- aryliminothiazolidine thereby obtained is converted into a physiologically acceptable salt thereof. In process (a), compounds of the formula:

are generally cyelized in the presence of a strong acid, whereas in the case of compounds of the formula:

I XCH2CH2NCS-NHR 10) in which X is halogeno or a sulphonyloxy group, for example a p-toluene sulphonyloxy radical, cyclization is generally carried out spontaneously immediately following their preparation, without addition of an acid. This type of reaction can be supported by heating.

Reactive esters of alcohols of the formula (8) include, for example, the halides and sulphuric acid esters thereof.

The thioureas of formula (9) used as starting materials can be prepared by reaction of arylisothiocyanates of formula l l) or arylthiocarbamic acid chlorides of formula (12) with Z-aminoethanols of formula (13):

The starting materials of formula 10) are, or example, obtained by reaction of isothiocyanates of formula 1 l or of thiocarbamic acid chlorides of formula l2) with amines of the formula:

( 1 or by reaction of thiocarbamie acid chlorides of the formula:

with amines of formula (4) given above.

The starting substances of formula (3) can be obtained in a known manner, for example by raction of isothiocyanatcs of the formula l 6) with the amines of formula (4) or by reaction of isothiocyanates of formula (l l) or thiocarbamic acid chlorides of formula l2) with amines of formula (17):

R'NCS In formulas (l l) to (17), R, R and X are as defined above.

The amines of formula (14) are, for example, obtained by reaction of hydrochlorides of the compounds of formula (13) with thionyl chloride or p-toluenesulphonic acid chloride. The compounds of formula (l5) are, in turn, obtainable from them by reaction with thiophosgene. The amines of formula l4) are obtained initially as salts from the process for their preparation. The corresponding amines are liberated from the salts, before or during the reaction with the isothioeyanates or thiocarbamic acid chlorides, or with thiophosgene, by adding basic substances, as for example alkali metal hydroxides, carbonates or biearbonates, or alkaline earth metal hydroxides, carbonates or bicarbonatcs, or tertiary amines.

If, for example, Z-ehlorophenylisothiocyanate nd 2- methylaminoethanol are used as starting substances, the course of the reaction can be represented by the following set of equations:

in the case of the reaction of 2 methylaminoethanol and 2,6-dichlorophenyl-thiocarbamic acid chloride, the reaction takes place in accordance with the following set of equations:

If Z-tert.-butylaminoethanol and 2 tolylisothiocyanate are used as starting substances, the

reaction takes place in acordance with the following set of equations:

CH l s0c1 2 HO-CH -cH -NH-C-CH Hc1 Suitable solvents or diluents for these reactions inelude hydrocarbons, such as benzene or ligroin, ethers such as diethyl ether or dioxane, halogenated hydrocar bons such as methylene chloride, ethylene chloride, ethylene bromide or chlorobenzene, esters such as ethyl acetate, alcohols such as ethanol, and water. The selection of the suitable solvent or diluent is determined by the stability and reactivity of the particular reactants involved, The use ofa solvent or diluent is desirable in most cases, but is not absolutely essential.

Suitable acids for the eyclization of the thioureas of formula (2) or (9) include aqueous or anhydrous strong mineral and organic acids, such as, for example,

hydrochloric acid, hydrohromie acid, phosphoric acid. polyphosphoric acids, sulphuric acid, benzenesulphonic acid or methanesulphonic acid.

Under these conditions, the methallyl compounds can, through a shift of the double bond, be rearranged to yield the 2,2 dimethylvinyl compounds.

The reaction temperatures can be varied within a fairly wide range. In general, the proces is carried out at 0 to [50C, preferably at the reflux temperature of 2-tolylisothiocyanate, Z-methoxyphenylisothioeyanate,

2 trifluoromethylphenylisothiocyanate, 2-fluorophenylisothiocyanate, 2chlorophenylisothiocyanate, Z-bromophenylisothiocyanate, 2,6-xylylisothiocyan ate,

1 1 methylphenylimino)-3-(2,3-dichloroallyl)-thiazolidinc, 2-( 2-chloro6-methoxyphenylimino )-3( 2,3- dichloroallyl)-thiazolidine, dimethoxyphenylimine)-3-(2,3-dichloroallyl)- thiazolidine, 2-(2-chloro6- trifluoromethylphenylimino )-3-( 2,3-dichloroallyl thiazolidine, 2-( 2-methyl-6- trifluoromethylphenylimino )-3 2,3-dichloroallyl thiazolidinc, 2-(2-methoxy-6- trifluoromethylphenylimino)-3-(2,3-dichloroallyl)- thiazolidine, 2-( 2,6-dichlorophenylimino )-3-( 2,3- dichloroallyl )-thiazolidine, 2-( l-naphthylimino )-3- (2,3-dichloroullyl )-thiazolidinc and 2-( 5,6,7,8- tetrahydrol-naphthylimino )-3-( 2,3-dichlorallyl thiazolidine.

The new substances according to the invention are basic in character and are in the main distillable oils which partly crystallise at room temperature. They can be used as free bases or in the form of their salts, for example the hydrochlorides, sulphates, phosphates, nitrates, acetates, lactates, succinates or naphthalene disulphonates.

The free bases, as well as the salts of the 2- aryliminothiazolidines according to the invention, show strong acaricidal properties, especialy against those acarids which attack, as animal ectoparasites, domesticated animals such as cattle and sheep. They are therefore well suited to combating animal ectoparasites of the order of the acarids. As ectoparasites of this nature, which are economically important, especially in tropical and sub-tropical countries, there may, for example, be mentioned: the Australian and South American cattle tick, Boophilus microplus, the South African cattle tick, Boophiulus decoloratus, and multi-host cattle ticks and sheep ticks of the genera Rhipicephalus, Amblyomma and Hyalomma, all from the family of the litodoidae.

Over the course of time, ticks have, in various areas, become resistant to the phosphoric acid esters and carbamates hitherto used as agents for combating them, so that in many areas the success in combating them has become dubious. To assure economical raising of animals in the areas where such attack occurs, there is therefore a requirement for agents by means of which ticks, including resistant strains, for example of the genus Boophilus, can be combated reliably. For example, in Australia the Ridgeland strain and the Biarra strain of Boophilus microplus have become highly resistant towards the phosphoric acid esters and carbamates used hitherto. The active substances according to the invention prove to be as active against the normally sensitive strains as against the resistant strains, for example of Boophilus. in doing so, they strongly inhibit the deposition of eggs by the adult forms.

In the same way, representatives from the family of the Sarcoptidae, such as the sheep scab mite (Psoroptes ovis) and the rabbit ear mite (Psoroptes cuniculi) can also be combated The active compounds according to the present invention can be converted into the usual formulations, such as solutions, emulsions, suspensions, powders, pastes and granulates. These may be produced in known manner, for example by mixing the active com pounds with extenders, that is, liquid or solid diluents or carriers, optionally with the use of surface-active agents, that is, emulsifying agents and/or dispersing agents. In the case of the use of water as an extender,

organic solvents can, for example, also be used as auxilary solvents.

As liquid diluents or carriers, there are preferably used aromatic hydrocarbons, such as xylenes or benzene, chlorinated aromatic hydrocarbons, such as chlorobenzenes, paraffins, such as mineral oil fractions, alcohols, such as methanol or butanol, or strongly polar solvents, such as dimethyl formamide or dimethyl sulphoxide, as well as water.

As solid diluents or carriers, there are preferably used ground natural minerals, such as kaolins, clays, talc or chalk, or ground synthetic minerals, such as highly-dispersed silicic acid or silicates.

Preferred examples of emulsifying agents include nonionic and anionic emulsifiers, such as polyoxyethylene-fatty acid esters, polyoxyethylene-fatty alcohol ethers, for example alkylarylpolyglycol ethers, alkyl sulphonates and aryl sulphonates; and preferred examples of dispersing agents include lignin, sulphite waste liquors and methyl cellulose.

The active substances may be applied in any usual manner, for example by powdering, spraying, watering or atomising, or in a dip.

The present invention, therefore, also provides an acaricidal composition containing as active ingredient a compound of the present invention in admixture with a solid diluent or carrier or in admixture with a liquid diluent or carrier containing a surface-active agent.

The present invention also provides a method of combating acarids which comprises applying to the acarids or an acarid habitat a compound of the present invention alone or in the form of a composition containing as active ingredient a compound of the present in admixture with a solid or liquid diluent or carrier.

The present invention also provides a method of treating animals, whereby they are freed of or protected from ectoparasitical acarids, which comprises externally applying a compound of the present invention to the animals.

Other auxiliaries, extenders and/or surface-active agents, or active substances, such as insecticides or disinfectants, can further be admixed to the formulations or to the ready-to-use solutions.

The effectiveness of the compounds of the present invention is illustrated in and by the following Examples.

EXAMPLE A In Vitro Test for the Inhibiting Action on the Deposition of Eggs by Ticks 3 parts of active substance are mixed with 7 parts of a mixture of equal parts by weight of ethylene glycol monomethyl ether and nonylphenol polyglycol ether. The emulsion concentraate thus obtained is diluted with water to the particular desired use concentration.

Adult gorged female ticks of the variety Boophilus microplus (resistant) are dipped for one minute into this active substance preparation. After dipping l0 female specimens of each of the various tick strains, the individual ticks are transferred into plastics dishes of which the bottom is covered with a disc of filter paper. After 35 days, the effectiveness of the active substance preparation is assessed by determining the inhibition of the deposition of fertile eggs as compared to the deposition of eggs by untreated control ticks. The action is quoted in with l00% denoting that fertile eggs were no longer deposited and 0'7: denoting that the ticks deposited eggs in the normal manner. like the untreated control ticks.

The active substances investigated. the Concentration examined, the parasites tested and the results obtained are shown in Table 1 below:

TABLE 1 in \itro test of the action of inhibiting the deposition of eggs h ticks [Boophilus microplus. Biurrzi strnin) Concentration demonstrating ](]l )"P 5H9) Aetiw Suhst-tince lnhihition Inhibition a C1 N=(H.'\' (m1 0.0x

a CH I II J (known comparison preparation) CH F 3 CH 3 (H 0.05 l k (H N 00" CI k 2*5 N & 3 0,1 (MB 5 TABLE l-Continued ln \itro test of the action of inhibiting the deposition of eggs by ticks (Boophiius microplus Biurrzl strain) Activ e Substance Concentration demonstrating inhibition inhibition CH CH-CH 2 2 F S&

N CH

CH -CH=CH (HIUK TABLE 1-C0ntinued The active substances investigated. concentrations examined. parasites tested and results obtained are In vitro test of the action at inhibiting the deposition of shew" in Table 2 w:

c s b ticks (Boo hilus micro lus Biarra strain) y p p 5 TABLE 2 Concentration ifi gsa in vitro test of the mite-destroying action in the case of Active Substance Inhibition Inhibition Pmmptes cumcul Concentration 10 demonstrating I 100% 50% CH Active Substance inhibition Inhibition cii CH 3 CH3 ci-i 003 00! CH 3 @CH N/ s l (1,03 0.01 CH CH -CH 3 N 2 7 CH3 Ct s N 3 0.03 um i; Ct

CH3 Cl 2 u t t CH2C=CH2 S 0.03 0.01 N 003 0003 EX I:

cit

s 003 001 CH; cH-c u N I /k Br CH3 30 E1 S N 0.01 001 EXAMPLE 3 In Vitro Test on Psoroptes Cuniculi cr 3 parts of active substance are mixed with 7 parts of 3 a mixture of equal parts by weight of ethylene glycol monomethyl ether and nonylphenol polyglycol ether. (N)

The emulsion concentrate thus obtained is diluted with water to the particular desired use concentration.

Larvae, nymphae and adults of Psoroptes cuniculi are brought into contact with this active substance preparation. For this purpose, 3 ml of the active sub- ["14 stance preparation are pipetted onto filter paper sand- Cl wiches, and the mites are introduced between the filter N paper discs and are stored for 24 hours in Petri dishes. After 24 hours. the activity of the active substance preparation is assessed by determining the number of the dead mites. The action is recorded in 7(, with I007: denoting that all mites have been destroyed and ()71 denoting that all mites are alive. 3

0,03 (Nil TABLE 2-Continued TABLE Z-Continued In vitro test of the mile-destroying action in the case of Psoroptes cuniculi Concentration Concentration demonstrating demonstrating 10071 507: 100% 50% Active Substance Inhibition Inhibition Active Substance Inhibition Inhibition N c+|(c|-| l CH2-CH':ICH2 F CH HCI 5 N 0.03 0001 cu is HO CH -CH:CH CH(CH 2 2 E 3 2 003 0.01 L

Cl F s L 5* c 3 0.03 0,0l

HC'l CH Ct c n (n case 4 9 0.03 0.01 r'/ 3) E-N ca 5 s/h 3 0.003 0,001 K 4 k naphthan lene-LS- 3 CH3 disulphonie acid (5) ("l N/CH2-CHICHZ 40 CH2C=CH2 Elk 0.03 001 N CF I; 0.03 0.0: 5 N 3 CH3 cu 2-CH:CH 2 I The preparative process and representative embodis ments are typified in and by the following examples N um um which being illustrative, should not be construed as a limitation on the scope of the present invention.

c1 55 EXAMPLE I:

2-(Z-Chlorophcnylimino)-3-methyl-thiazolidine l35.7 g (0.8 mol) of 2-chlorophenyl-isothiocyanate CH c|-o-cH are added, over the course of one-half hour, to a solu- N 2 2 tion of 60 g (0.8 mol) of Z-methylaminoethanol in 500 Kg CH cos of methylene chloride, while stirring; in the course 5 N thereof, the mixture starts to boil. It is stirred for a further hour under reflux and then evaporated to dryness, the residue is treated with 480 ccs of concentrated hy- CH 6; drochloric acid, and the reaction mixture is stirred for i 1 hour under reflux. After cooling, the batch is diluted with 1 litre of water and rendered alkaline with concen- (27; trated sodium hydroxide solution, while cooling, and

11c 1 use which is formed as an oil is extracted with methylene chloride. The extract is dried over sodium :wulphute and CHJPOI'JJILILi, and the residue is distilled. Boiling point: l3514(lC/0,01 mm Hg, The yield is 1471 g [817: of theory).

The following compounds can he prepared by processes analogous to that given above:

2-( 2Toly1imino 3-methyl-thiuzolidine, boiling point 120C/0.01 mm Hg,

2-( Z-Mcthoxyphenylimino )-3-methyl-thiazolidine,

hydrochloride, melting point:228 229C,

2-( 2-Trifluoromethylphenylimino )-3-methylthiazolidine, boiling point 119 125C/0.01 mm Hg,

2-12Bromophenylimino)-3-methyl-thiazolidine, hy-

drochloride, melting point 184 185C,

2-( 2 ,o-Mylylimino )-3-methyl-thiazolidine,

chloride, melting point 248 253C,

2( 2-Methoxy-6-methy1phenylimino )-3-methy1 thiazolidine, hydrochloride, melting point 217 218C,

2-( LChloro--methylphenylimino )-3-methylthiazolidine, melting point 87 89C,

2( 2,6-Dimethoxyphenylimino )-3-methylthiazolidine, hydrochloride, melting point 216 217C,

2-(1-Naphthylimino)-3-methyl-thiazolidine, melting point 80 81C,

2-( 5 ,6,7,8-Tetrahydrol -naphthylimino l-3-methylthiuzolidine, boiling point 192 198C/0.02 mm Hg,

2-(2-Chlorophenylimino)-3-ethyl-thiazolidine, boiling point 132 140C/0.01 mm Hg,

2-( 2,6-Xy1ylimino J3 ethy1-thiazo1idine, ride, melting point 194 195C,

2-( 2 Chloro-6-methy1phenylimino )-3-ethylthiazolidine, boiling point 144 148C/0.0l mm Hg,

2-( 1 Naphthylimino)-3-ethyl-thiazolidine,

point 95 96C,

2-( 5,6,7,8-Tetr:1hydro-1-naphthylimino)-3-ethylthiazolidine, boiling point 180 192C/0.01 mm Hg,

2-( 2-ChlorophenyliminoJ-3-n-propyl-thiaz0lidine, hydrochloride. melting point 1 138 4 140C,

2-(2,6-Xy1ylimino)-3-n-propyl-thizizolidinc, hydrochloride, melting point 190 191C,

2-12-Chloro-6-methylphenyliminoJ-3-n-propy1- thiuzolidine, hydrochloride, melting point 173 174C,

2-( 2-Ch1oro 6methoxyphenylimino )-3-n-propyllhiilZOlldlHC, melting point 146 150C,

2-( 2-Methoxylrmethylphenylimino )3 n-propylthiazolidine, boiling point: 143 |47C/0,01 mm Hg.

2-( |-Nuphthy1iminol3-n-pr0pyl-thiazolidine, boiling point 178 182C/002 mm Hg,

2-(5,6,7,8-Tctrahydro-lnaphthylimino)-3-n-propylthiuzolidine, boiling point: 184 187C/0.0l mm Hg,

2-( 2-To1y1imino )-3-is0propy1-thiz12olidine,

point 1 134 4 136C/001 mm Hg,

2-( 2-Chlorophenylimino}-3-isopropyl-thiazolidine,

neutral naphthulene-1,5-disulphonate, melting point 254 256C,

2-( 2-Bromophenylimino J-3-isopropyl-thiuzolidine,

boiling point L 137 142Cx'001 mm Hg,

hydrohydrochlo melting hoilin g 2-( 2-Methoxyphcnylimino)-3-isopropyl-thizizolidinc,

hydrochloride, melting point 184 4 187C,

2-(2,6-Xylylimino)-3-isopropyl-thiazolidine, hydrochloride, melting point 1 240C,

2-( 2-Chloro--methylphenylimino )-3-isopropylthiazolidine, hydrochloride, melting point 207 209C,

2-( 2Chloro-o-methoxyphcnylimino)-3 isopropylthiazolidine, boiling point 148 153C/().O1 mm 2-( 2-MethoXy-6-methylphenylimino )-3- isopropylthiazolidine, boiling point C/0.02 mm Hg,

2-( 1-Naphthy1imino)-3-isopropyl-thiuzolidine, melting point 97 99C,

2-(5,6,7,8-Tctmhydro-1-nziphthylimino)-3isopropyl-thiazolidine, boiling point 179 184C/0.01 mm Hg,

2-( 2-Tolylimino)-3-n-hutyl-thiazolidine,

point 147 149C/0.0l mm Hg,

2-( 2-Chloropheny1imino)-3-n-hutyl-thiu2olidine,

boiling point 146 156C/0.01 mm Hg,

2-( Z-Bromophenyliminol-3n-butyl-thiuzolidine,

boiling point 163 168C/0.02 mm Hg,

2-(4-Chloro-2-methy1pheny1imino)-3-isopropylthiazolidine, hydrochloride, melting point: 196198C,

2-(4-Chlor0 2-methylphenylimino)-3-n-buty1- thiazolidine, boiling point 160-164C,

2-(2,6-Xyly1imino)-3-isobutyl-thiuzolidine,

point 160162C,

2-(2,4-Xylylimino)-3isohutyl-thiuzolidine,

point IMP-148C,

2-( 2,3-Xylylimin0 J-3-isobutyl-thiuzolidine,

point 161) l64C,

2-( 2-Chloro-6-methylphenylimino J-lisobutylthiazolidine, boiling point 158 160C, 2-(4-Ch1or0-2-methylphenylimino)-3-isohutylthiazolidine, boiling point 148-160C, 2-(3-Chloro-2-methylphenylimino)-3-isobutylthizizolidine, boiling point l50*]61C,

2-( 2,4 Dichlorophcnylimino )-3-isobutylthiazolidine, boiling point 168178C,

0,012-(2-Bromophenylimino3-isobuty1- thiazolidine, boiling point 175178C,

2-(2,4,6-Trimethylphenylimino 3-isohutylthiuzolidine, boiling point 162 164C,

2-(2,3-Xy1yliminoJ 3-methyl-thizizolidine,

point 150-154C.

2-(2,4Xy1yliminoJ-3-methyl-thiazolidine,

point 144l48C,

2-( 4-Chloro-2 methy1phenylimino )-3-methy1- thiazolidine, boiling point ]60164C.

2-(2,6-Xylylimino)-3n-butylthiuzolidine, neutral naphthalene-1,S-disulphonute, melting point 250 253C,

2-(2-Chloro-6-methylphenylimino)-3-n-butyl thiazolidine, hydrochloride, melting point 143 144C,

2-( 2 Ch1oro-o-methoxyphenylimino )-3-n-butylthiazolidine, boiling point: 161 C/0.01 mm 2-(2 Methoxy-fi-methylphenylimino)-3-n-butylthiazolidine, boiling point 158 164C/0.01 mm Hg,

2-(l-Nuphthylimino1-3-n-hutyl-thiuzolidine, hydrochloride. melting point 197 199C,

2-( 5,6,7,8-'1ctruhydro l-nnphthylimino )-3-n-butylboiling boiling boiling boiling boiling boiling thiazolidine. boiling point 193 197C/0.02 mm Hg.

EXAMPLE 2 2-( 2.o-Dichlorophenylimino)-3-thiozolidinc A solution of 24.3 g (0.15 mol) of 2.6-dichloroaniline and 25.8 g 150 mol) of thiophosgene in 150 ccs of dry ethylene chloride is stirred overnight under reflux. The mixture is then evaporated to dryness under reduced pressure, the crude 2,6-dich1orophenyl-thioearbamic acid chloride is taken up in 100 ccs of absolute benzene, and the impurities are filtered off and rinsed with absolute benzene. The filtrate is slowly added dropwise, at room temperature, to a solution of 24.8 g (0.33 mol) of 2-methylaminoethanol in 100 ccs of absolute benzene, and the mixture is stirred for a further 4 hours under reflux and is again evaporated to dryness. The residue, consisting of N-(2.6-dich1orophenyl)-N-2- hydroxyethyl-N'-methy1thiourea and 2- methylaminoethanol hydrochloride, is stirred for l hour with 90 ccs of concentrated hydrochloric acid, under reflux. After cooling, the batch is diluted with 200 ccs of water and rendered alkaline with concentrated sodium hydroxide solution, while cooling, and the product is recrystallized from benzene-ligroin. Melting point: 110 1 13C. The yield is 25.6 g (65.6% of theory).

The following compounds are obtained analogously:

2-( 2 ,6-Dichlorophenylimino )-3-ethy1-thioazolidine,

hydrochloride, melting point 191 193C,

2-( 2.6-Dichlorophenylimino )-3 -n-propylthiazolidine. hydrochloride, melting point 188 2-( 2.6-Dich1orophenylimino )-3-isopropy1- thiazolidine, hydrochoride, melting point 21 1 213C,

2-(2,6-Dichlorophenylimino)-3-n-butyl-thiazolidine.

hydrochloride, melting point 160 162C.

2-(2,6-Dichloropheny1imino)-3-sec.-butylthiazolidine, boiling point 156 160C/0.01 mm Hg,

2-( 2,6-Dich1orophcnylimino )-3-isobutylthiazolidine, boiling point 161 166C/0.02 mm Hg 2-( 2 ,6-Dibromo4-methylphenylimino )-3-methy1- thiazolidine. melting point 137 138C.

EXAMPLE3 2-(2To1ylimino)-3-tert.-butyl-thiazolidine A solution of 11.7 g (0.1 mol) of 2-tert.-

butylaminoethanol in 50 ccs of dry benzene is saturated with dry hydrogen chloride. Thereafter, 1 1.4 g (0.105 mol) of thionyl chloride are added dropwise to the mixture, which is stirred for 2 hours at room temperature and then at 40 to 45C until the evolution of gas has ceased, and is evaporated to dryness under reduced pressure. The crude Z-tert-butylaminoethyl chloride hydrochloride is taken up in 100 ccs of dry chloroform and treated with 14.9 g (0.1 mol) of 2' tolylisothiocyanatc. Thereafter a solution of 10.1 g (0.1 mol) of dry triethylamine in 25 ccs of dry chloroform is added dropwise to the reaction mixture which is stirred for 2 hours at room temperature and 3 hours under reflux and evaporated to dryness under reduced pressure, the residue is taken up in water and rendered alkaline with concentrated sodium hydroxide solution, and the product is extracted with ether. The extract is dried over sodium sulphate and evaporated. and the residue is distilled. Boiling point 145 148C/0.01 mm Hg. The yield is 16.4 g (66% of theory).

The following compounds can be prepared by processes analogous to that given above:

2-(2-Chlorophenylimino)-3-tert.-butyl-thiazolidine,

boiling point 151 155C/0.02 mm Hg.

2-( 2-bromophenylimino )-3-tert.-butyl-thiazolidine boiling point 158 160C/0.02 mm Hg.

2-( 2-Methoxyphenylimino )-3-tert.-butylthiazolidine. boiling point 152 155C/0.01 mm 2-(2.6-xylylimino)-3-tert.-butyl-thiazolidine, boiling point 153 155C/0.02 mm Hg.

2-(2-Chloro-6-methylphenylimino)-3-tert.-buty1- thiazolidine. boiling point 159 163C/0.02 mm 2-( 2-Ch1oro-6-methoxyphenylimino )-3-tert.-buty1- thiazolidine, boiling point 154 157C/0.02 mm 2-(2-Methoxy-o-methylphenylimino)-3-tert.-buty1- thiazolidine, boiling point 152 158C/0.02 mm 2-( 1-Naphthy1imino)-3-tert.-buty1-thiazo1idine, boiling point 167 171C/0.02 mm Hg,

2-( 5 ,6,7 ,S-Tetrahydrol -naphthylimino )-3 tert.-

butyl-thiazolidine, boiling point 177 181C/0.02 mm Hg.

EXAMPLE 4 2-(2-Tolylimino )-3-allyl-thiazolidine 11.9 g of 2-toly1isothiocyanate are added, over the course of one-half hour, while stirring, to a solution of 8.1 g (0.08 mol) of 2-allyl-aminoethanol in 35 ccs of methylene chloride. The mixture is stirred for a further hour under reflux and then evaporated to dryness under reduced pressure, the residue is treated with g of polyphosphoric acid, and the reaction mixture is stirred for 5 hours at 80C. After cooling. the mix is taken up in ice water and rendered alkaline with concentrated potassium hydroxide solution, the base is extracted with methylene chloride. the extract is dried over sodium sulphate and evaporated, and the residue is distilled. Boiling Point: 138C/0.02 mm Hg. The yield is 7.7 g (41.5% of theory).

The following are obtained by processes analogous to that given above:

2-( Z-Chlorophenylimino}3-allyl-thiazolidine,

ing point: 138 142C/0.01 mm Hg,

2-( 2-Trifluoromethylphenylimino)-3-a11y1- thiazolidine, boiling point: 128 132C/0.01 mm Hg, point:

2-(2,6-Xylylimino)-3-allyl-thiazolidine, boiling point:

139C/0.01 mm Hg,

2-( 2-Chloro-6-methylphenylimino )-3-ally1- thiazolidine, boiling point: 15() C/0.01 mm Hg; hydrochloride. melting point: 166C.

2-(1-Naphthylimino)-3-allyl-thiazolidine, boiling point: 138 143C/0.01 mm Hg,

2-( 2-Tolylimino)-lcrotyhthiazolidine, boiling point:

137 141C/0.02 mm Hg.

2-(2-Chlorophcnylimino)-3-crotyl-thiazolidine, boiling point: 135 137C/0.()1 mm Hg,

2-(Z-Trifluoromethylphenylimino)3-crotylthiazolidine, boiling point: 133 137C/().01 mm Hg,

boil- 2-( lo-Xylylimino )-3-crotyl-thiazolidirlc.

point: 143- 145C/0.01 mm Hg.

2( ZChloro-o-methylphcnylimino)-3-crotylthiazolidine. boiling point: 141 144C,

2-( 1-Naphthylimino)-3-erotyl-thiazolidine,

point: 145 150C/O.()1 mm Hg,

2-( 2-Trifluoromethylphenylimino)-3-methallylthiazolidine, boiling point: 132- 136C/O.()1 mm Hg.

2-(2-Ch1oropheny1imino)-3-(2-chloroallyl)- thiazolidine. boiling point: 155 160C/0.()1 mm Hg.

2-(Z-Trifluoromethylphenylimino)-3-(2-chloroal1y1)- thiazolidine, boiling point: 157 161C/0.0l mm Hg.

2-(2,6-Xylylimino)-3 (Z-chloroallyl)-thiazo1idine.

boiling point: 160 167C/0.02 mm Hg.

2-( 2-Chloro-6-methylphenylimino )-3-( 2- chloroallyl)-thiazolidine. boiling point:

164C/0.()1 mm Hg,

2-( 2-Tolylimino)-3-( 2,3-dichloroallyl )-thiazolidine,

boiling point: 172 176C/0.01 mm Hg,

2-(Z-Chlorophenylimino)-3-(2,3-dichloroallyl)- thiazolidine. boiling point: 175 l78C/0.01 mm Hg.

2-(2.6-Xylylimino)-3-(2.3-dichloroal1yl)- thiazolidine. boiling point: 178 182C/0.01 mm 2-( 2-Chloro-6-methylphenylimino )3-( 2,3-

dichloroallyl)thiazolidine, boiling point:

185C/0.01 mm Hg.

Z( 2.6-Xylylimino )-3-( 3-chloroallyl J-thiazolidine.

boiling point: 158 163C/'(].()1 mm Hg.

2-(2-Chloro-fi-mcthylphenylimino)-3(3- chloroallyl)-thiazolidinc. boiling point:

168C/U.U1 mm Hg.

2-( 2-Bromophcnylimino)-3-ally1-thiazolidinc, boiling point 158162C,

2-(2.S-Xylylimino)-3-allyl-thiazolidine. boiling point 2-(2.4-Xylylimino) 3-allyl-thiazolidine. boiling point 2-( 3-Chloro-Z-methylphenylimino )-3-allyl thiazolidinc. boiling point 152154C.

2-(2.4 Dichlorophenylimino) 3-allyl-thiazolidine.

boiling point 16(]168C.

2-( 2.4.6-Trimcthy1phenylimino )3allyl-thiazolidine,

boiling point ()-152C.

2-(2-Bromophenylimino)-3-(2.2-dimethylvinyl)- thiazolidine. boiling point 17()175C.

2-(2.3-Xylylimino)-3-(Z.2-dimcthy1viny1)- thiazolidine. boiling point l6()164C.

Z-(2.4-Xylylimino)-3-(lZ-dimcthylvinylJ- thiazolidinc, boiling point 152l 58C.

2-(2.5-Xylylimino)-3-(2.2-dimethy1vinyl)- thiazolidine, boiling point 146162C.

2-( 3-Chloro-2-methylphenylimino )-3-( 2,2'dimethyl vinyl)thiuzolidinc boiling point l65-171C.

2-( 4-Chloro-Z-methylphenylimino ]-3-( 2,2-dimethy1- vinyU-thiazolidine. boiling point 168172C.

2- S-Chloro-Z-mcthylphenylimino )-3-( 2,2-dimcthylvinyl)-thiazolidine. boiling point l72l 78C.

2-(2.4-Diehlorophcnylimino)-3-(2.2-dimethylvinyl)- thiazolidine, boiling point 172l 80C.

2-( 4-Chloro-2-trifluormethylphenylimino )-3-( 22 dimethylvinyl)-thiazolidine. boiling point l48-164C, neutral naphthalene-1,5-disulfonate. melting point: 214C.

boiling boiling 2-( 2.4.6-Trimethylphenylimino )-3-( 2,2-dimethylvinyll-thiazolidine, boiling point 152-154C, 2-(2,4.5-Trichlorophcnylimino)-3-(2,2-dimethylvinyl)-thiazolidine. boiling point 180190"C, 2-(4-Chloro-2-rnethylphenylimino)-3-methally1- thiazolidine. boiling point 169175C. 2-(2.4-Xylylimino)-3-methallyl-thiazolidine, boiling point 156-1 61C.

EXAMPLE 5 2-(2-Chlorophenylimino)-3-methyl-thiazo1idine 20. 0 g (0.1 mol) of l-(2-chlorophenyl)-3-methylthiourea together with g of 1,2-dibromopropane are stirred for 8 hours under reflux. After cooling, the crystals which have separated out are filtered off. rinsed with ether and dissolved in warm water, and the mixture is rendered alkaline with concentrated sodium hydroxide solution. The oily base is extracted with methylene chloride, the extract is dried over sodium sulphate and evaporated, and the residue is distilled. Boiling point: 138: 145C/0.02 mm Hg. The yield is 13. 2 g (58% of theory).

EXAMPLE 6 2-( Z-Chloro-6-methylphenylimino )-3-ethy1- thiazolidine A solution of 8.9 (0.1 mol) of 2-ethylaminoethanol in 50 ccs of dry benzene is saturated with hydrogen chloride. Thereafter, 11.4 g ((1.105 mol) of thionyl chloride are added drop-wise to the mixture, which is stirred for 2 hours at room temperature and thereafter under reflux until the evolution of gas has ceased. and the batch is evaporated to dryness under reduced pressure. The crude Zethylaminoethyl chloride hydrochloride is taken up in 50 ccs of water and treated with a solution of 13.0 g (0.113 mol) of thiophosgene in 50 ccs of ethylene chloride. 19 g of powdered calcium earbonate are then introduced in portions over the course of approximately 4 hours, while stirring vigorously. Stirring of the mixture is continued at room temperature until no further evolution of gas occurs (approxi mately 6 hours), the organic phase is separated off. dried over sodium sulphate and slowly treated, while stirring, with a solution of 14.1 g (0.1 mol) of 2-ehloro -methylanilinc and 10.1 g (0.1 mol) of triethylan me in 20 ccs of ethylene chloride. and the reaction mi ire is stirred for 2 hours at room temperature and isequently for 4 hours under reflux. After coolin the batch is twice extracted by shaking with dilute nodium hydroxide solution, the organic phase is dried over sodium sulphate and evaporated. and the residue is distilled. Boiling point: 145 148C/0.()l mm Hg. The yield is 15.8 g (62% of theory).

EXAMPLE 7 2-(2-Chlorophenylimino)-3-methyl-thiazolidine A mixture of 13.3 g ((1.1 mol) of Z-thiono-3 methylthiazolidine. 12.8 g (11.1 mol) of Z-chloroaniline and 50 ccs of chlorohenzene is heated to C for 2 hours. while stirring. Thereafter the solution is evaporated undcr reduced pressure and the residue is dis tilled. Boiling point: 138 14lC/().Ol mm Hg. The yield is 12.2 g (54)? of theory).

EXAMPLE 8 2-( Z-Chloro-o-methylphenylimino )J-allyl-thiazolidine 18.4 g ((1.1 mol) of 2-chloro-fi-mcthylphenylisothiocyanate are added over the course oi 1/2 hour. while stirring, to a solution of 6.8 g ((J.l mol) of 90 per cent strength Z-aminoethanol in 50 ccs of methylene chloride. The mixture is stirred for a further hour under reflux and then evaporated to dryness under reduced pressure. the residue is treated with 40 ccs of concentrated hydrochloric acid, and the reaction mixture is stirred for 1 hour under reflux, After cooling, the batch is diluted with 120 ccs of water and rendered alkaline with concentrated sodium hydroxide solution, while cooling, and the 2-(2-chloro-o-methylphenylamino)- thiazoline, obtained in the form of crystals of melting point 14 1 143C, is filtered off. After drying, it is dissolved in 150 ccs of dry benzene and l2. 1 g (0.l mol) of allyl bromide are added over the course of one-half hour. The reaction mixture is stirred for 1 hour at 50C and 2 hours under reflux and after cooling is thoroughly shaken with 60 ccs of per cent strength sodium hydroxide solution until the crystals have dissolved. After separating the phases, the aqueous layer is additionally twice extracted with benzene. The combined benzene phases are dried over sodium sulphate and subsequently saturated with dry hydrogen chloride The hydrochloride which precipitates is filtered off and recrystallized from ethanol-ether, and melts at l65 l66C. The yield is 24.9 g (82% of theory).

EXAMPLE 9 The following compounds may be prepared by processes analogous to that described in Example 4:

2-(4-Chloro-Z-methylphenylimino)-3-allylthiazolidine, boiling point: 180 l88C/0.05 mm Hg.

2-(4-Chloro-2-trifluoromethylphenylimino )-3-allylthiazolidine, boiling point: l44 l50C/0.0l mm 2-(2-Tolylimino)-3-(2,2-dimethylvinyl)-thiazolidine, neutral naphthalene-l,S-disulphonate, melting point 2l2 216C,

2-( 2-Chlorophenylimino)-3-( 2,2-dimethylvinyl thiazolidine, boiling point: 147 l60C/0.0l mm 2-( 2,6-Xylylimino )-3-( 2,2-dimethylvinyl thiazolidine, neutral naphthalene-l .5- disulphonate, melting point 232 235C,

2-( 2-Chloro-6-methylphenylimino )-3-( 2,2-dimethylvinyU-thiazolidine, hydrochloride, melting point: |82 [86C,

2-( 4-Chloro-2-trifluoromethylphenylimino )-3-( 2- chloroallyl)-thiazolidine, boiling point: l52 l58C/0.0l mm Hg.

What is claimed is:

1. An acaricidal composition comprising an effective amount of a compound selected from the group consisting of a 2-aryliminothiazolidine of the formula:

wherein R is phenyl substituted by one to three members so lccted from the group consisting of lower alkyl, lower alkoxy, halogeno or trifluoromethyl, one of said substituents being in the 2-position; l-naphthyl or 5,6,7,8-tetrahydrol -naphthyl, and R is lower alkyl, lower alkenyl or lower chloroalke- S /& N R

wherein R is phenyl substituted by one to three members selected from the group consisting of lower alkyl, lower alkoxy, halogeno or trifluoromethyl, one of said substituents being in the 2-position', lnaphthyl; or S,6,'7,8-tetrahydro-l-naphthyl; and

R is lower alkenyl or lower chloroalkcnyl; and the physiologically acceptable acid addition salts thereof.

3. The composition according to claim 1, wherein R is 2-substituted phenyl, 2,6-disubstituted phenyl, 2,4- disubstituted phenyl or 2,4,6-trisubstituted phenyl in which the substituents are selected from the group consisting of methyl, methoxy, fluoro, chloro. bromo or trifluoromethyl and R is allyl, crotyl, methallyl, 2,2- dimethylvinyl, 2-chloroallyl, 3-chloroallyl or dichloroallyl.

4. The composition according to claim I wherein R is phenyl substituted by one to three members selected from the group consisting of lower alkyl, lower alkoxy, halogeno or trifluoromethyl, one of said substituents being in the 2-position.

5. The composition according to claim 1 wherein R is l-naphthyl or 5,6,7,8-tetrahydro-l-naphthyl.

6. The composition according to claim 1 wherein R is 2-substituted phenyl, 2,6-disubstituted phenyl, 2,4- disubstituted phenyl or 2,4,6-trisubstituted phenyl in which the substituents are selected from the group consisting of methyl, methoxy, fluoro, chloro, bromo or trifluoromethyl and R is methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec.-butyl, tert.butyl, allyl, crotyl, methallyl, 2,2-dimethylvinyl, 2-chloroallyl, 3- chloroallyl or 2,3-dichloroallyl.

7. The composition according to claim 1 in which said compound is 2-( 3-tolylimino)-3- methylthiazolidine.

8. The composition according to claim 1 in which said compound is 2-( 2 ,o-xylylimino )-3- methylthiazolidine.

9. The composition according to claim 1 in which said compound is 2-(2-chloro-6-methylphenylimino)- 3-methylthiazolidine.

10. The composition according to claim 1 in which said compound is 2-( 2,6-xylylimino )-3- ethylthiazolidine.

I]. The composition according to claim 1 in which said compound is 2-( 2-tolylimino )-3-allylthiazolidine.

12. The composition according to claim I in which said compound is 2-( 2,6-xylylimino )-3- allylthiazolidine.

13. The composition according to claim 1 in which said compound is 2-(2-chloro-6-methylphenylimino)- 3-allylthiazolidine.

l4. The composition according to claim I in which said compound is 2-( Zb-xylylimino )-3-( 2- chl' illyl)thiazolidine.

15. The composition according to claim I in which said compound is 2-( Z-chlorophenylimino )-3- methylthiazolidine.

16. The composition according to claim 1 in which said compound is 2-( Z-bromophenylimino )-3- methylthiazolidine,

17. The composition according to claim 1 in which said compound is 2-( Q-trifluoromethylphenylimino)-3- methylthiazolidinc.

18. The composition according to claim I in which said compound is 2-(2,6-dichlorophenylimino)-3- methylthiazolidinei 19. The composition according to claim I in which said compound is 2-( l-naphthylimino )-3 mcthylthiazolidine,

20. The composition according to claim 1 in which said compound is 2-( 5,6],8-tetrahydrol naphthylimino)-3-methylthiazolidine.

21. The composition according to claim 1 in which said compound is 2-( Z-chlorophenylimino )-3- ethylthiazolidinet 22. The composition according to claim 1 in which said compound is 2-(Z-chloro-6-methylphenylimino)- 3'ethylthiazolidine.

23. The composition according to claim 1 in which said compound is Z-(Z-chlorophenylimino)-3 npropylthiazolidine.

24. The composition according to claim 1 in which said compound is 2-(2,6-xylylimino)-3-npropylthiazolidine 25. The composition according to claim 1 in which said compound is 2-(2-chloro-6-methylphenylimino)- 3-n-propylthiazolidine.

26. The composition according to claim I in which said compound is 2-(2,6-dichlorophenylimino)-3-npropylthiazolidine 27. The composition according to claim 1 in which said compound is 2-(Z-methoxyphenylimino)-3- isopropylthiazolidine.

28. The composition according to claim 1 in which said compound is 2-(2-chlorophenylimino) 3- isopropylthiazolidine.

29. The composition according to claim 1 in which said compound is 2-( 2,6-xylylimino)-3- isopropylthiazolidine.

30. The composition according to claim 1 in which said compound is 2-(Z-chloro-6'methylphenylimino)- 3-isopropylthiazolidinei 3]. The composition according to claim 1 in which said compound is 2-(2,6-xylylimino)-3-nhutylthiazolidine.

32. The composition according to claim 1 in which said compound is 2-( Z-chlorophenylimino )-3- allylthialolidinc.

33. The composition according to claim 1 in which said compound is 2-(2-chloro-o-methylphenyliminoJ 3( ll-dimethylvinyl )thiazolidine.

34. The composition according to claim 1 in which said compound is 2-( 2-trifluoromethyl-4- chlorophenyliminoJ-3-allylthia2olidine.

35. The composition according to claim I in which said compound is 2-(2-chlorophenylimino)-3-(2,2- dimcthylvinyl Jthiazolidine.

36. The composition according to claim 1 in which said compound is Z( 2-trifluoromethyl4- chlorophenylimino )-3-( lchloroallyl Jthiazolidaie.

37. The composition according to claim 1 in which said compound is 2-(l4-xylylimino)-3 (2 2-dimethylvinyl)thiazolidine,

38. The composition according to claim 1 in which said compound is 2-(Q-methyhkchlorophenylimino)- 3-( 2,2-dimethylvinyl lthiazolidinc.

39. A composition according to claim 1 in which said compound is the hydrochloride sulfate. phosphate nitrate, acetate, lactate, succinate or naphthalenedisulfonate salt.

40. The method of combatting acarids which comprises applying an acaricidally effective amount of a compound selected from the group consisting of a 2 aryliminothiazolidine of the formula:

wherein R is phenyl substituted by one to three members selected from the group consisting of lower alkyl, lower alkoxy, halogeno or trifluoromethyl. one of said substituents being in the 2-position'. l-naphthyl or 5 6 7,8-tetrahydro-l-naphthyl, and R is lower alkyl, lower alkenyl or lower chloroalkenyl, and the physiologically acceptable acid addition salts thereof, to an acarid habitat so as to permit contact with the acarid.

41. The method according to claim 40, wherein R is phenyl substituted by one to three members selected from the group consisting of lower alkyl, lower alkoxy halogeno or trifluoromethyl, one of said substituents being in the 2-position 42. The method according to claim 40, wherein R is l-naphthyl or 5,6,7,8-tetrahydro-l-naphthyl 43. The method according to claim 40, wherein R is 2-substituted pheny], 2,6-disubstituted phcnyl 2,4 disubstituted phenyl or 2.4,6-trisubstituted phcnyl in which the substituents are selected from the group con sisting of methyl, methoxy, fluoro, chloro hromo or tri fluoromethyl and R is methyl, ethyl, n-propyl, isopro pyl, n-butyl, isohutyl, sec.-hutyl, tert.hutyl, ally]. crotyl. methallyl, 2,2-dimethylvinyl, lchloroallyl, 3- chloroallyl or 2,3-dichloroallyl.

44. The method according to claim 40, in which said compound is 2-(3-tolylimino)3methylthiazolidine.

45. The method according to claim 40, in which said compound is 2-(2,6-xylylimino)J'methylthiazolidine.

46. The method according to claim 40, in which said compound is 2(Z-chloro-o-methylphcnylimino)3- methylthiazolidine.

47. The method according to claim 40, in which said compound is Z-f2 6xylyliminoJ-Bcthylthiazolidine.

48. The method according to claim 40, in which said compound is 2-(2tolylimino)-3-allylthiazolidine.

49. The method according to claim 40 in which said compound is 2-(2,6-xylylimino)-3-a]lylthiaaolidine S0. The method according to claim 40, in which said compound is 2-(Z-chloro-o-methylphcnylimino)-3- allylthiazolidonel S1. The method according to claim 40, in which said compound is 2-(2,6-xylylimino)-3-(2- chloroallyl)thiazolidine.

52. The method according to claim 40, in which said compound is 2-(2-chlorophenylimino)-3- methylthiazolidine.

53. The method according to claim 40, in which said compound is 2-(2-bromophenylimino)-3- methylthiazolidine.

54. The method according to claim 40, in which said compound is 2-(Z-trifluoromethylphenylimino)-3- methylthiazolidine.

55. The method according to claim 40, in which said compound is 2-(2,o-dichlorophenylimino)-3- methylthiazolidine.

56. The method according to claim 40, in which said compound is 2-( l-naphthylimino )-3- methylthiazolidine.

57. The method according to claim 40, in which said compound is 2-(5,6,7,8-tetrahydro-l-naphthylimino)- 3-methylthiazolidine.

58. The method according to claim 40, in which said compound is 2-(2-chlorophenylimino)-3- ethylthiazolidine.

S9. The method according to claim 40, in which said compound is 2-(2-chloro-o-methylphenylimino)-3- ethylthiazolidine.

60. The method according to claim 40, in which said compound is 2-( 2-chlorophenylimino )-3-n propylthiazolidine.

61. The method according to claim 40, in which said compound is 2-(2,6-xylylimino)-3-npropylthiazolidine.

62. The method according to claim 40. in which said compound is 2-(2-chloro-6-methylphenylimino)-3-npropylthiazolidine.

63. The method according to claim 40, in which said compound is 2-( 2,6-dichlorophenylimino )-3-n propylthiazolidine.

64. The method according to claim 40, in which said compound is 2-( Z-methoxyphenylimino )-3- isopropylthiazolidine.

65. The method according to claim 40, in which said compound 2-(2-chlorophenylimino)-3 isopropylthiazolidine.

66. The method according to claim 40. in which said compound is 2-( 2,6-xylylimino )-3- isopropylthiazolidine.

67. The method according to claim 40, in which said compound is 2-(2-chloro-o-methylpncnylimino)-3- isopropylthiazolidine.

68. The method according to claim 40, in which said compound is 2-(2 6-xylylimino)-3-n-butylthiazolidine.

69. The method according to claim 40, in which said compound is 2-( Z-chlorophenylimino )-3- allylthiazolidine.

70. The method according to claim 40, in which said compound is 2-(2-chloro-6-methylphenylimino)-3- (2,2-dimethylvinyl )thiazolidine.

7 l. The method according to claim 40, in which said compound is 2-( 2-trifluoromethyl-4' chlorophcnylimino)-3-allylthiazolidine.

72. The method according to claim 40. in which said compound is 2-(Z-chlorophenylimino)'3-(2,2-dimethylvinyl )-thiazolidinc.

wherein R is phenyl substituted by one to three members selected from the group consisting of lower alkyl, lower alkoxy, halogeno or trifluoromethyl, one of said substituents being in the 2-position; lnaphthyl; or 5 6,7,8-tetrahydro-l-naphthyl; and

R is lower alkenyl or lower chloroalkenyl; and the physiologically acceptable acid addition salts thereof.

78. The method according to claim 40, wherein R is Z-substituted phenyl, 2,6-disubstituted phenyl, 2,4- disubstituted phenyl or 2,4,6-trisubstituted phenyl in which the substituents are selected from the group consisting of methyl, methoxy, fluoro. chloro, bromo or trifluoromethyl and R is allyl, crotyl, methallyl, 2,2 dimethylvinyl, 2-chloroallyl, 3-chloroallyl or 2.3- dichloroallyl.

79. A composition for use against acarids, comprising an amount effective to inhibit deposition of eggs by the adult form of an aearid of a compound selected from the group consisting of a Z-aryliminothiazolidine of the formula:

N R' S k N R wherein R is phenyl substituted by one to three members selected from the group consisting of lower alkyl, lower alkoxy, halogeno or trifluoromethyl, one of said substituents being in the 2-position; l-naphthyl or 5 .6,7,8-tertrahydrol -naphthyl, and

R' is lower alkyl, lower alkenyl or lower chloroalkenyl, and the physiologically acceptable acid addi tion salts thereof in admixture with a liquid or solid diluent or carrier.

80. The composition according to claim 79, wherein the compound is 2-(Z-tolylimino)'3-methylthiazolidine.

81. The composition according to claim 79, wherein the compound is 2-(2.6-xylylimino)-3-methylthiazolidine.

82. The composition according to claim 79, wherein the compound is 2-(2-chloro-6-mcthylphcnylimino)-3- methyl-thiazolidine.

83. The composition according to claim 79, wherein the compound is 2-( 2,6-xylylimino )-3-ethylthiazolidine.

84. The composition according to claim 79, wherein the compound is 2-(Z-tolylylimino)-3-allylthiazolidine.

85. The composition according to claim 79, wherein the compound is 2-(2,6-xylylimino)-3-allylthiazolidinc.

86. The composition according to claim 79, wherein the compound is 2-(2-chloro-o-mcthylphenylimimo)- 3-allylthiazolidine.

87. The composition according to claim 79, wherein the compound is 2-(4-chloro-2-methylphenylimino)-3- (2,2-dimethylvinyl )-thiazolidiner 88. The composition according to claim 79, wherein the compound is 2-(2,4-xylylimino)-3-(2,2-dimethylvinyl )-thiazolidine.

89. The composition according to claim 79, wherein the compound is 2-(2,5-xylylimino)-3-(2,2-dimethylvinyl )-thiazolidine.

90. The composition according to claim 79, wherein the compound is 2-( 2,4-xylylimino)-3 isobutylthiazolidine.

91. The composition according to claim 79, wherein the compound is 2-(2-chloro-6-methylphenylimino)-3- isobutyl-thiazolidine.

92. The composition according to claim 79, wherein the compound is 2-(2,6-xylylimino)-3-(2-chloroallyl)- thiazolidine.

93. The composition according to claim 79, wherein the compound is 2 (2-chloro-6-methylimino)-3 2,2- dimcthylvinyl)-thiazolidine.

94. A method of inhibiting deposition of eggs by the adult form of an acarid, which comprises applying to the adult form of an acarid or to an acarid habitat so as to permit contact with the adult form of the acarid. an amount effective to inhibit deposition of eggs by the adult form of the acarid of a compound selected from the group consisting of a Z-aryliminothiazolidine of the formula:

s/kbI R wherein R is phenyl substituted by one to three members selected from the group consisting of lower alkyl, lower alkoxy, halogeno or trifluoromethyl, one of said substituents being in the 2-position; l-naphthyl or 5,6,7,8-tetrahydrol -naphthyl, and

R is lower alkyl, lower alkcnyl or lower chloroalkenyl, and the physiologically acceptable acid addition salts thereof.

95. The method according to claim 94, wherein said compound is 2-(Z-tolylimino)-3-methyl-thiazolidine.

96. The method according to claim 94, wherein said compound is 2-(2,6-xylylimino)-3-methyl-thiazolidine.

97. The method according to claim 94, wherein said compound is 2-(2-chloro-6-methylphenylimino)-3- methyl-thiazolidine.

98. The method according to claim 94, wherein said compound is 2-(2,6-xylylimino)-3-ethyl-thiazolidine.

99. The method according to claim 94, wherein said compound is 2-(Q-tolylimino)-3-ethyl-thiazolidine.

100. The method according to claim 94, wherein said compound is 2-(2,6-xylyliminoJ-3-allyl-thiazolidine.

101. The method according to claim 94, wherein said compound is 2-(2-chloro-fi-methylphcnylimino)3- allyl-thiazolidine,

102. The method according to claim 94, wherein said compound is 2-(4-chloro2-methylphenylimino)-3- (2,2-dimethylvinyl)-thiazolidine,

103. The method according to claim 94, wherein said compound is 2-(2,4-xylylimino -3-( 2,2-dimethylvinyl thiazolidine.

104. The method according to claim 94, wherein said compound is 2-( 2,5-xylyiimino)-3-( 2,2-dimethylvinyly thiazolidine.

105. The method according to claim 94, wherein said compound is 2-( 2,4-xylylimino )-3isobutyl thiazolidine.

106. The method according to claim 94, wherein said compound is 2-(2-chlor0-6methylphenylimino)-3- isobutyl-thiazolidine.

107. The method according to claim 95, wherein said compound is 2-(2,6-xylylimino)-3(2 chloroallyl)- thiazolidine.

108. The method according to claim 96, wherein said compound is 2-( 2-chloro-6-rnethylimino)-3-(2,2 limethylvinyl )-thiazolidine.

1t is cm'tifiwl that error appears in the above-identified patent and that said Letters Patent are hereby Cfilfl'vctQ l as shown below:

In claims 1, 2, 40 and 77, the structural formula should appear as follows:

S N R Signed and Emaed this 

1. AN ACARICIDAL COMPOSITION COMPRISING AN EFFECTIVE AMOUNT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A 2-ARYLIMINOTHIAZOLIDINE OF THE FORMULA:
 2. The composition according to claim 1, in which the compound is selected from the group consisting of a 2-aryliminothiazolidine of the formula:
 3. The composition according to claim 1, wherein R is 2-substituted phenyl, 2,6-disubstituted phenyl, 2,4-disubstituted phenyl or 2,4,6-trisubstituted phenyl in which the substituents are selected from the group consisting of methyl, methoxy, fluoro, chloro, bromo or trifluoromethyl and R'' is allyl, crotyl, methallyl, 2,2-dimethylvinyl, 2-chloroallyl, 3-chloroallyl or 2, 3-dichloroallyl.
 4. The composition according to claim 1 wherein R is phenyl substituted by one to three members selected from the group consisting of lower alkyl, lower alkoxy, halogeno or trifluoromethyl, one of said substituents being in the 2-position.
 5. The composition according to claim 1 wherein R is 1-naphthyl or 5,6,7,8-tetrahydro-1-naphthyl.
 6. The composition according to claim 1 wherein R is 2-substituted phenyl, 2,6-disubstituted phenyl, 2,4-disubstituted phenyl or 2,4,6-trisubstituted phenyl in which the substituents are selected from the group consisting of methyl, methoxy, fluoro, chloro, bromo or trifluoromethyl and R'' is methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec.-butyl, tert.butyl, allyl, crotyl, methallyl, 2,2-dimethylvinyl, 2-chloroallyl, 3-chloroallyl or 2,3-dichloroallyl.
 7. The composition according to claim 1 in which said compound is 2-(3-tolylimino)-3-methylthiazolidine.
 8. The composition according to claim 1 in which said compound is 2-(2,6-xylylimino)-3-methylthiazolidine.
 9. The composition according to claim 1 in which said compound is 2-(2-chloro-6-methylphenylimino)-3-methylthiazolidine.
 10. The composition according to claim 1 in which said compound is 2-(2,6-xylylimino)-3-ethylthiazolidine.
 11. The composition according to claim 1 in which said compound is 2-(2-tolylimino)-3-allylthiazolidine.
 12. The composition according to claim 1 in which said compound is 2-(2,6-xylylimino)-3-allylthiazolidine.
 13. The composition according to claim 1 in which said compound is 2-(2-chloro-6-methylphenylimino)-3-allylthiazolidine.
 14. The composition according to claim 1 in which said compound is 2-(2,6-xylylimino)-3-(2-chloroallyl)thiazolidine.
 15. The composition according to claim 1 in which said compound is 2-(2-chlorophenylimino)-3-methylthiazolidine.
 16. The composition according to claim 1 in which said compound is 2-(2-bromophenylimino)-3-methylthiazolidine.
 17. The composition according to claim 1 in which said compound is 2-(2-trifluoromethylphenylimino)-3-methylthiazolidine.
 18. The composition according to claim 1 in which said compound is 2-(2,6-dichlorophenylimino)-3-methylthiazolidine.
 19. The composition according to claim 1 in which said compound is 2-(1-naphthylimino)-3-methylthiazolidine.
 20. The composition according to claim 1 in which said compound is 2-(5,6,7,8-tetrahydro-1-naphthylimino)-3-methylthiazolidine.
 21. The composition according to claim 1 in which said compound is 2-(2-chlorophenylimino)-3-ethylthiazolidine.
 22. The composition according to claim 1 in which said compound is 2-(2-chloro-6-methylphenylimino)-3-ethylthiazolidine.
 23. The composition according to claim 1 in which said compound is 2-(2-chlorophenylimino)-3-n-propylthiazolidine.
 24. The composition according to claim 1 in which said compound is 2-(2,6-xylylimino)-3-n-propylthiazolidine.
 25. The composition according to claim 1 in which said compound is 2-(2-chloro-6-methylphenylimino)-3-n-propylthiazolidine.
 26. The composition according to claim 1 in which said compound is 2-(2,6-dichlorophenylimino)-3-n-propylthiazolidine.
 27. The composition according to claim 1 in which said compound is 2-(2-methoxyphenylimino)-3-isopropylthiazolidine.
 28. The composition according to claim 1 in which said compound is 2-(2-chlorophenylimino)-3-isopropylthiazolidine.
 29. The composition according to claim 1 in which said compound is 2-(2,6-xylylimino)-3-isopropylthiazolidine.
 30. The composition according to claim 1 in which said compound is 2-(2-chloro-6-methylphenylimino)-3-isopropylthiazolidine.
 31. The composition according to claim 1 in which said compound is 2-(2,6-xylylimino)-3-n-butylthiazolidine.
 32. The composition according to claim 1 in which said compound is 2-(2-chlorophenylimino)-3-allylthiazolidine.
 33. The composition according to claim 1 in which said compound is 2-(2-chloro-6-methylphenylimino)-3-(2,2-dimethylvinyl)thiazolidine.
 34. The composition according to claim 1 in which said compound is 2-(2-trifluoromethyl-4-chlorophenylimino)-3-allylthiazolidine.
 35. The composition according to claim 1 in which said compound is 2-(2-chlorophenylimino)-3-(2,2-dimethylvinyl)thiazolidine.
 36. The composition according to claim 1 in which said compound is 2-(2-trifluoromethyl-4-chlorophenylimino)-3-(2-chloroallyl)thiazolidine.
 37. The composition according to claim 1 in which said compound is 2-(2,4-xylylimino)-3-(2,2-dimethylvinyl)thiazolidine.
 38. The composition according to claim 1 in which said compound is 2-(2-methyl-4-chlorophenylimino)-3-(2,2-dimethylvinyl)thiazolidine.
 39. A composition according to claim 1 in which said compound is the hydrochloride, sulfate, phosphate, nitrate, acetate, lactate, succinate or naphthalenedisulfonate salt.
 40. THE METHOD OF COMBATTING ACARIDS WHICH COMPRISES APPLYING AN ACARICIDALLY EFFECTIVE AMOUNT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A 2-ARYLIMINOTHIAZOLIDINE OF THE FORMULA:
 41. The method according to claim 40, wherein R is phenyl substituted by one to three members selected from the group consisting of lower alkyl, lower alkoxy, halogeno or trifluoromethyl, one of said substituents being in the 2-position.
 42. The method according to claim 40, wherein R is 1-naphthyl or 5,6,7,8-tetrahydro-1-naphthyl.
 43. The method according to claim 40, wherein R is 2-substituted phenyl, 2,6-disubstituted phenyl, 2,4-disubstituted phenyl or 2, 4,6-trisubstituted phenyl in which the substituents are selected from the group consisting of methyl, methoxy, fluoro, chloro, bromo or trifluoromethyl and R'' is methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec.-butyl, tert.butyl, allyl, crotyl, methallyl, 2,2-dimethylvinyl, 2-chloroallyl, 3-chloroallyl or 2,3-dichloroallyl.
 44. The method according to claim 40, in which said compound is 2-(3-tolylimino)-3-methylthiazolidine.
 45. The method according to claim 40, in which said compound is 2-(2,6-xylylimino)-3-methylthiazolidine.
 46. The method according to claim 40, in which said compound is 2-(2-chloro-6-methylphenylimino)-3-methylthiazolidine.
 47. The method according to claim 40, in which said compound is 2-(2,6-xylylimino)-3-ethylthiazolidine.
 48. The method according to claim 40, in which said compound is 2-(2-tolylimino)-3-allylthiazolidine.
 49. The method according to claim 40, in which said compound is 2-(2,6-xylylimino)-3-allylthiazolidine.
 50. The method according to claim 40, in which said compound is 2-(2-chloro-6-methylphenylimino)-3-allylthiazolidone.
 51. The method according to claim 40, in which said compound is 2-(2,6-xylylimino)-3-(2-chloroallyl)thiazolidine.
 52. The method according to claim 40, in which said compound is 2-(2-chlorophenylimino)-3-methylthiazolidine.
 53. The method according to claim 40, in which said compound is 2-(2-bromophenylimino)-3-methylthiazolidine.
 54. The method according to claim 40, in which said compound is 2-(2-trifluoromethylphenylimino)-3-methylthiazolidine.
 55. The method according to claim 40, in which said compound is 2-(2,6-dichlorophenylimino)-3-methylthiazolidine.
 56. The method according to claim 40, in which said compound is 2-(1-naphthylimino)-3-methylthiazolidine.
 57. The method according to claim 40, in which said compound is 2-(5,6,7,8-tetrahydro-1-naphthylimino)-3-methylthiazolidine.
 58. The method according to claim 40, in which said compound is 2-(2-chlorophenylimino)-3-ethylthiazolidine.
 59. The method according to claim 40, in which said compound is 2-(2-chloro-6-methylphenylimino)-3-ethylthiazolidine.
 60. The method according to claim 40, in which said compound is 2-(2-chlorophenylimino)-3-n-propylthiazolidine.
 61. The method according to claim 40, in which said compound is 2-(2,6-xylylimino)-3-n-propylthiazolidine.
 62. The method according to claim 40, in which said compound is 2-(2-chloro-6-methylphenylimino)-3-n-propylthiazolidine.
 63. The method according to claim 40, in which said compound is 2-(2,6-dichlorophenylimino)-3-n-propylthiazolidine.
 64. The method according to claim 40, in which said compound is 2-(2-methoxyphenylimino)-3-isopropylthiazolidine.
 65. The method according to claim 40, in which said compound is 2-(2-chlorophenylimino)-3-isopropylthiazolidine.
 66. The method according to claim 40, in which said compound is 2-(2,6-xylylimino)-3-isopropylthiazolidine.
 67. The method according to claim 40, in which said compound is 2-(2-chloro-6-methylpnenylimino)-3-isopropylthiazolidine.
 68. The method according to claim 40, in which said compound is 2-(2,6-xylylimino)-3-n-butylthiazolidine.
 69. The method according to claim 40, in which said compound is 2-(2-chlorophenylimino)-3-allylthiazolidine.
 70. The method according to claim 40, in which said compound is 2-(2-chloro-6-methylphenylimino)-3-(2,2-dimethylvinyl)thiazolidine.
 71. The method according to claim 40, in which said compound is 2-(2-trifluoromethyl-4-chlorophenylimino)-3-allylthiazolidine.
 72. The method according to claim 40, in which said compound is 2-(2-chlorophenylimino)-3-(2,2-dimethylvinyl)-thiazolidine.
 73. The method according to claim 40, in which said compound is 2-(2-trifluoromethyl-4-chlorophenylimino)-3-(2-chloroallyl)-thiazolidine.
 74. The method according to claim 40, in which said compound is 2-(2,4-xylylimino)-3-(2,2-dimethylvinyl)thiazolidine.
 75. The method according to claim 40, in which said compound is 2-(2-methyl-4-chlorophenylimino)-3-(2,2-dimethylvinyl)thiazolidine.
 76. The method according to claim 40, in which said compound is the hydrochloride, sulfate, phosphate, nitrate, acetate, lactate, succinate or naphthalenedisulfonate salt.
 77. The method according to claim 40, in which said compound is selected from the group consisting of a 2-aryliminothiazolidine of the formula:
 78. The method according to claim 40, wherein R is 2-substituted phenyl, 2,6-disubstituted phenyl, 2,4-disubstituted phenyl or 2, 4,6-trisubstituted phenyl in which the substituents are selected from the group consisting of methyl, methoxy, fluoro, chloro, bromo or trifluoromethyl and R'' is allyl, crotyl, methallyl, 2,2-dimethylvinyl, 2-chloroallyl, 3-chloroallyl or 2,3-dichloroallyl.
 79. A composition for use against acarids, comprising an amount effective to inhibit deposition of eggs by the adult form of an acarid of a compound selected from the group consisting of a 2-aryliminothiazolidine of the formula:
 80. The composition according to claim 79, wherein the compound is 2-(2-tolylimino)-3-methyl-thiazolidine.
 81. The composition according to claim 79, wherein the compound is 2-(2,6-xylylimino)-3-methyl-thiazolidine.
 82. The composition according to claim 79, wherein the compound is 2-(2-chloro-6-methylphenylimino)-3-methyl-thiazolidine.
 83. The composition according to claim 79, wherein the compound is 2-(2,6-xylylimino)-3-ethyl-thiazolidine.
 84. The composition according to claim 79, wherein the compound is 2-(2-tolylylimino)-3-allyl-thiazolidine.
 85. The composition according to claim 79, wherein the compound is 2-(2,6-xylylimino)-3-allyl-thiazolidine.
 86. The composition according to claim 79, wherein the compound is 2-(2-chloro-6-methylphenylimimo)-3-allylthiazolidine.
 87. The composition according to claim 79, wherein the compound is 2-(4-chloro-2-methylphenylimino)-3-(2,2-dimethylvinyl)-thiazolidine.
 88. The composition according to claim 79, wherein the compound is 2-(2,4-xylylimino)-3-(2,2-dimethylvinyl)-thiazolidine.
 89. The composition according to claim 79, wherein the compound is 2-(2,5-xylylimino)-3-(2,2-dimethylvinyl)-thiazolidine.
 90. The composition according to claim 79, wherein the compound is 2-(2,4-xylylimino)-3-isobutyl-thiazolidine.
 91. The composition according to claim 79, wherein the compound is 2-(2-chloro-6-methylphenylimino)-3-isobutyl-thiazolidine.
 92. The composition according to claim 79, wherein the compound is 2-(2,6-xylylimino)-3-(2-chloroallyl)-thiazolidine.
 93. The composition according to claim 79, wherein the compound is 2-(2-chloro-6-methylimino)-3-(2,2-dimethylvinyl)-thiazolidine.
 94. A method of inhibiting deposition of eggs by the adult form of an acarid, which comprises applying to the adult form of an acarid or to an acarid habitat so as to permit contact with the adult form of the acarid, an amount effective to inhibit deposition of eggs by the adult form of the acarid of a compound selected from the group consisting of a 2-aryliminothiazolidine of the formula:
 95. The method according to claim 94, wherein said compound is 2-(2-tolylimino)-3-methyl-thiazolidine.
 96. The method according to claim 94, wherein said compound is 2-(2,6-xylylimino)-3-methyl-thiazolidine.
 97. The method according to claim 94, wherein said compound is 2-(2-chloro-6-methylphenylimino)-3-methyl-thiazolidine.
 98. The method according to claim 94, wherein said compound is 2-(2,6-xylylimino)-3-ethyl-thiazolidine.
 99. The method according to claim 94, wherein said compound is 2-(2-tolylimino)-3-ethyl-thiazolidine.
 100. The method according to claim 94, wherein said compound is 2-(2,6-xylylimino)-3-allyl-thiazolidine.
 101. The method according to claim 94, wherein said compound is 2-(2-chloro-6-methylphenylimino)-3-allyl-thiazolidine.
 102. The method according to claim 94, wherein said compound is 2-(4-chloro-2-methylphenylimino)-3-(2,2-dimethylvinyl)-thiazolidine.
 103. The method according to claim 94, wherein said compound is 2-(2,4-xylylimino)-3-(2,2-dimethylvinyl)-thiazolidine.
 104. The method according to claim 94, wherein said compound is 2-(2,5-xylylimino)-3-(2,2-dimethylvinyl)-thiazolidine.
 105. The method according to claim 94, wherein said compound is 2-(2,4-xylylimino)-3-isobutyl-thiazolidine.
 106. The method according to claim 94, wherein said compound is 2-(2-chloro-6-methylphenylimino)-3-isobutyl-thiazolidine.
 107. The method according to claim 95, wherein said compound is 2-(2,6-xylylimino)-3-(2-chloroallyl)-thiazolidine.
 108. The method according to claim 96, wherein said compound is 2-(2-chloro-6-methylimino)-3-(2,2-dimethylvinyl)-thiazolidine. 